/*
 *  Copyright 2017 Eclipse HttpClient (http4e) http://nextinterfaces.com
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.roussev.http4e.editor.xml.rules;

import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.MultiLineRule;

/**
 * 
 * @author Phil Zoio
 */
public class StartTagRule extends MultiLineRule {

   public StartTagRule( IToken token) {
      this(token, false);
   }


   protected StartTagRule( IToken token, boolean endAsWell) {
      super("<", endAsWell ? "/>" : ">", token);
   }


   protected boolean sequenceDetected( ICharacterScanner scanner, char[] sequence, boolean eofAllowed){
      int c = scanner.read();
      if (sequence[0] == '<') {
         if (c == '?') {
            // processing instruction - abort
            scanner.unread();
            return false;
         }
         if (c == '!') {
            scanner.unread();
            // comment - abort
            return false;
         }
      } else if (sequence[0] == '>') {
         scanner.unread();
      }
      return super.sequenceDetected(scanner, sequence, eofAllowed);
   }
}